Only update visible items when search value is empty (fluxxcode#181)

* Only update visible items when search value is empty

* Update changelog

CHANGELOG.md

@@ -15,6 +15,7 @@
 - Made default egui fonts an optional feature `default_fonts` [#163](https://github.com/fluxxcode/egui-file-dialog/pull/163) (thanks [@StarStarJ](https://github.com/StarStarJ)!)
 - Filter directory when loading to improve performance [#169](https://github.com/fluxxcode/egui-file-dialog/pull/169)
 - Implement non blocking directory loading [#177](https://github.com/fluxxcode/egui-file-dialog/pull/177)
+- Only update visible items in the central panel if the search value is empty and the create directory dialog is currently closed [#181](https://github.com/fluxxcode/egui-file-dialog/pull/181)
 
 ### 📚 Documentation
 - Updated `README.md` to include latest features [#176](https://github.com/fluxxcode/egui-file-dialog/pull/176)

src/data/directory_content.rs

@@ -275,6 +275,15 @@ impl DirectoryContent {
         &self.state
     }
 
+    /// Returns an iterator in the given range of the directory cotnents.
+    /// No filters are applied using this iterator.
+    pub fn iter_range_mut(
+        &mut self,
+        range: std::ops::Range<usize>,
+    ) -> impl Iterator<Item = &mut DirectoryEntry> {
+        self.content[range].iter_mut()
+    }
+
     pub fn filtered_iter<'s>(
         &'s self,
         search_value: &'s str,
@@ -293,6 +302,7 @@ impl DirectoryContent {
             .filter(|p| apply_search_value(p, search_value))
     }
 
+    /// Marks each element in the content as unselected.
     pub fn reset_multi_selection(&mut self) {
         for item in &mut self.content {
             item.selected = false;